Also, a lot of the people in the bunkers are not supposed to be there in the legal sense above, which is why they end up there.
They’re all migrant workers and are allowed to be in Beijing without Hukou. Hukou Just establishes certain privileges like home ownership and school access.
The best way to think about Hukou for Americans is that Hukou is like if California required a Texan or Floridian to get a Visa or become a “California Citizen” before working there, buying a home there, or using public services there.
But it’s also created this strange “illegal migrant” issue in all the top tier cities (PK, SH, GZ, etc).
I think any person who can pay to avoid it absolutely will. Chinese traffic makes American traffic seem completely smooth.